PEEICLISTTJS BRANDTI. 55 



The species of this genus are inquilines in the galls 

 of Rhodites and Diastrophus. They are black, with 

 the legs reddish-yellow, the abdomen blackish or 

 brownish, and the mesothorax is pilose. 



Only two European and four North American 

 species are known. 



1 (2) Parapsidal furrows reaching almost to the base of the meso- 



notum ; mesopleurse completely striated. Brandti. 



2 (1) Parapsidal furrows incomplete ; mesopleuree with a clear, shining, 



impunctate space. Caninse. 



1. Pbeiolistus Brandti. 

 PI. XIII, fig. 2, ? . 



Cynips Brandti, Ratzeburg, Berl. Jahr. d. Pharm., 1832; 



Brandt and Ratzeburg, Medic. Zool., ii, 



1833, 151. 

 Aulax Brandti, Htg., Germ. Zeits., ii, 196; Schenck, Nass. Cyn., 



96 and 97 ; Marshall, B. M. M., iv, 274 ; 



Mayr, Europ. Cyn., 11 ; Thorns., Opusc, 



viii, 800. 



Black; the legs reddish-yellow, the coxae blackish, the antennas 

 blackish ; head and thorax opaque, rather strongly aciculate, the 

 parapsidal furrows reaching to the base of the mesonotum or nearly so. 



The i$ has the antennas testaceous, except the base and apical joints, 

 which are darker coloured. 



Length 2*5 to 3 mm. 



A larger and stouter species than caninse, and 

 easily distinguished from it by the presence of the 

 parapsidal furrows. 



An inquiline in the galls of Rhodites rosse. 



I have seen several examples from England, but 

 have no record of the precise locality. I have taken 

 it in Clydesdale. On the Continent it is found in 

 Sweden and Germany. 



